Monarchs are mostly popular figureheads. They keep the country stable with their presence. Some countries still have Absolute Monarchs (A King or Emporer with all power). Most kings and queens are exempt from being convicted of crimes, and can desolve parliament and remove anyone from the government.
Under the leadership of Prime Minister Neville Chamberlain, the United Kingdom originally undertook a policy of appeasement by which they let an increasingly aggressive Germany become more belligerent in the hopes that they would tucker themselves out and be satisfied after invading a few countries.
They all were however they want you to answer Russia because Russia left the Axis Powers after Hitler attacked Russia.